# Scrapy settings for mall_spider project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     https://docs.scrapy.org/en/latest/topics/settings.html
#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = "mall_spider"

SPIDER_MODULES = ["mall_spider.spiders"]
NEWSPIDER_MODULE = "mall_spider.spiders"


# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = "mall_spider (+http://www.yourdomain.com)"

# Obey robots.txt rules
ROBOTSTXT_OBEY = True

# Configure maximum concurrent requests performed by Scrapy (default: 16)
#CONCURRENT_REQUESTS = 32

# Configure a delay for requests for the same website (default: 0)
# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
#DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
#CONCURRENT_REQUESTS_PER_DOMAIN = 16
#CONCURRENT_REQUESTS_PER_IP = 16

# Disable cookies (enabled by default)
#COOKIES_ENABLED = False

# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False

# Override the default request headers:
#DEFAULT_REQUEST_HEADERS = {
#    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
#    "Accept-Language": "en",
#}
# DEFAULT_REQUEST_HEADERS = {
#     "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
#     "Accept-Encoding": "gzip, deflate, br",
#     "Accept-Language": "zh-CN,zh;q=0.9,en;q=0.8",
#     "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.95 Safari/537.36",
# }

# Enable or disable spider middlewares
# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
#    "mall_spider.middlewares.MallSpiderSpiderMiddleware": 543,
#}

# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
#    "mall_spider.middlewares.MallSpiderDownloaderMiddleware": 543,
#}

# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
#    "scrapy.extensions.telnet.TelnetConsole": None,
#}

# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
# 2. 在settings.py开启, 类别的Pipeline
ITEM_PIPELINES = {
   "mall_spider.pipelines.JdCategoryPipeline": 300,
   "mall_spider.pipelines.JdProductPipeline": 301,
}

# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
#AUTOTHROTTLE_ENABLED = True
# The initial download delay
#AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
#AUTOTHROTTLE_DEBUG = False

# Enable and configure HTTP caching (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
#HTTPCACHE_ENABLED = True
#HTTPCACHE_EXPIRATION_SECS = 0
#HTTPCACHE_DIR = "httpcache"
#HTTPCACHE_IGNORE_HTTP_CODES = []
#HTTPCACHE_STORAGE = "scrapy.extensions.httpcache.FilesystemCacheStorage"

# Set settings whose default value is deprecated to a future-proof value
TWISTED_REACTOR = "twisted.internet.asyncioreactor.AsyncioSelectorReactor"
FEED_EXPORT_ENCODING = "utf-8"
LOG_LEVEL = "INFO"

# 配置MongoDB的URL
MONGODB_URL = 'mongodb://127.0.0.1:27017'
# MONGODB_USERNAME = 'root'
# MONGODB_PASSWORD = 'root'

# 实现scrapy_reids: 2.在settings文件中配置scrapy_redis
# REDIS数据链接
REDIS_URL = 'redis://127.0.0.1:6379/1'

# 去重容器类: 用于把已爬指纹存储到基于Redis的set集合中
DUPEFILTER_CLASS = "scrapy_redis.dupefilter.RFPDupeFilter"
# 调度器: 用于把待爬请求存储到基于Redis的队列
SCHEDULER = "scrapy_redis.scheduler.Scheduler"
# 是不进行调度持久化:
# 如果是True, 当程序结束的时候, 会保留Redis中已爬指纹和待爬的请求
# 如果是False, 当程序结束的时候, 会清空Redis中已爬指纹和待爬的请求
SCHEDULER_PERSIST = True
